The Guatemala City metropolitan area is a conglomeration of densely populated municipalities surrounding Guatemala City. In 2005, the metropolitan area was defined by the governments of Guatemala and Guatemala City as comprising the municipalities of Amatitlán, Chinautla, Guatemala City, Mixco, San Miguel Petapa, Santa Catarina Pinula, Villa Canales and Villa Nueva. Together these eight municipalities cover 478 square kilometres and were projected by Guatemala's National Institute of Statistics to have a combined population of 2,749,161 in 2015.